Keith Wall created PROTON-1672:
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Summary: Large deliveries comprising many transfers are handled
inefficiently
Key: PROTON-1672
URL: https://issues.apache.org/jira/browse/PROTON-1672
Project: Qpid Proton
Issue Type: Bug
Components: proton-j
Affects Versions: proton-j-0.23.0
Reporter: Keith Wall
Priority: Normal
Running performance tests using Qpid Broker J and Qpid JMS Client (0.26.0)
shows that receipt of large messages is very slow in comparison with the send
of the same message. For instance, sending 300MiB bytes message takes 5
seconds on my laptop. The receipt takes 97 seconds.
Instrumenting the client stack shows an obvious hot-spot in Proton-J.
{{org.apache.qpid.proton.engine.impl.TransportSession#handleTransfer}}
re-allocates/array copies the delivery buffer for ever transfer that comprises
it. This leads to a non-linear loss of performance. The stack include
Proton-J 0.23.0, but is looks like this code is unchanged.
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